Necropsy ve Organ Ağırlıkları

One of the most critical stages of preclinical drug development and chemical safety assessment begins at the conclusion of an in vivo study. The planned autopsy (necropsy) is perhaps the most delicate step—and the one requiring the highest degree of standardization—as it forms the foundation for all morphological and biochemical data to be obtained from the experimental animal. Even the slightest error or deviation from the protocol at this stage can jeopardize the integrity of a study that has taken months to complete and may lead to the rejection of your data by regulatory authorities.

Nano-Tox Laboratory Services believes that the necropsy and organ weight measurement procedures, which are at the very heart of our Pathology Testing Unit, constitute the “First Step” toward reliable toxicology data. At our facilities, which operate under the highest standards of Good Laboratory Practice (GLP), we carry out this vital step with scientific rigor and absolute regulatory awareness.

Why Is Standardization in Necropsy Indispensable?

One of the most objective methods for determining a substance’s target organ toxicity is the accurate recording of changes in organ weight. Relative and absolute organ weights serve as the earliest and most quantitative indicators of pathological conditions such as hypertrophy, atrophy, or edema. However, for these data to be meaningful, the necropsy procedure must be standardized, validated, and conducted in a blinded manner.

At Nano-Tox laboratories, we use detailed Necropsy SOPs (Standard Operating Procedures) specifically prepared for each study. Our team, consisting of expert pathology technicians and board-certified veterinary pathologists, performs the dissection of each organ by adhering to the same anatomical boundaries and consistently removing surrounding tissue and adipose tissue. Subsequently, organ weights are simultaneously recorded using our high-precision balances, which are regularly calibrated and isolated from environmental vibrations. Thanks to double-blind data entry and real-time quality assurance (QA) checks, transcription errors are reduced to zero.

From Tissue to Data: Maintaining the GLP Chain

The necropsy table is just the beginning of the pathology process. Our Pathology Testing Unit comprehensively manages the entire journey of tissue samples—from collection at the time of necropsy through to histopathological examination. Immediately after organ weighing, the tissues are preserved in GLP-compliant fixation solutions, and the chain of custody protocol is initiated. This integrated approach ensures the complete data integrity required by OECD test guidelines and FDA/EMA regulations.

Whether you are conducting a subchronic toxicity study or a carcinogenicity bioassay, at Nano-Tox laboratories, the weight of each organ is more than just a number; it is quantitative evidence of the test substance’s complex interaction with the biological system.

We know that the power behind the “p-value” in your study’s final report stems from the precise steps you take during this first and most critical phase.

If you are looking for a reliable pathology partner for your preclinical research, we would be delighted to welcome you to our GLP-compliant facilities. Because in science, great discoveries often begin with the accurate measurement of the smallest details. At Nano-Tox, we measure, record, and interpret every detail for you.